At 21, he is the same age as Alli but has barely made 40 caps in his professional career, while the Spurs midfielder has played close to 200 games in all competitions and is an England regular.
Both Cook and Solanke were part of England Under-20's World Cup triumph in the summer.
"He's got two feet, he's got energy and pace, he can score a goal and he can create goals".
Many in the English game have been tipping the 20-year-old to shine on the global stage since he was in his early teens, but a combination of nagging injuries and just 32 appearances for Chelsea over three seasons has seen him overtaken by the likes of Dele Alli and, more recently, Harry Winks. I had Gareth in charge for almost three years with the under-21s and the boys have been great.
Cook captained the side and has played six times for Bournemouth this season, with four of those appearances coming in the Premier League.
But despite seeing his on-pitch development stall while training with Chelsea's first team at Cobham, Loftus-Cheek insisted he feels no bitterness towards his parent club and actually thinks he has benefited from the experience.
Chelsea's social media post about Ruben Loftus-Cheek hasn't gone down well with their own fans.
"I felt like I needed to play a lot, so I came in and said I wanted to go away from Chelsea and play games".
"But I believe that if you do all the right things, in time you will get your opportunities". He's got so many good attributes, top attributes, and that's why we put him into the team. "I have a good relationship with Eddie Newton [Chelsea's loan technical coach] and Eddie is helping me behind the scenes".
The England goalkeeping position has been long-debated and Southgate clearly has a big call to make after he handed a debut to Jordan Pickford and the Everton keeper showed why he is rated so highly.
"He's an exciting player - we've got a few exciting players".